net/batman-adv/netlink.c

   1 /* Copyright (C) 2016 B.A.T.M.A.N. contributors:
   2  *
   3  * Matthias Schiffer
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of version 2 of the GNU General Public
   7  * License as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "netlink.h"
  19 #include "main.h"
  20
  21 #include <linux/atomic.h>
  22 #include <linux/byteorder/generic.h>
  23 #include <linux/errno.h>
  24 #include <linux/fs.h>
  25 #include <linux/genetlink.h>
  26 #include <linux/if_ether.h>
  27 #include <linux/init.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/netlink.h>
  30 #include <linux/printk.h>
  31 #include <linux/rculist.h>
  32 #include <linux/rcupdate.h>
  33 #include <linux/skbuff.h>
  34 #include <linux/stddef.h>
  35 #include <linux/types.h>
  36 #include <net/genetlink.h>
  37 #include <net/netlink.h>
  38 #include <net/sock.h>
  39 #include <uapi/linux/batman_adv.h>
  40
  41 #include "bat_algo.h"
  42 #include "bridge_loop_avoidance.h"
  43 #include "gateway_client.h"
  44 #include "hard-interface.h"
  45 #include "originator.h"
  46 #include "packet.h"
  47 #include "soft-interface.h"
  48 #include "tp_meter.h"
  49 #include "translation-table.h"
  50
  51 struct genl_family batadv_netlink_family = {
  52         .id = GENL_ID_GENERATE,
  53         .hdrsize = 0,
  54         .name = BATADV_NL_NAME,
  55         .version = 1,
  56         .maxattr = BATADV_ATTR_MAX,
  57 };
  58
  59 /* multicast groups */
  60 enum batadv_netlink_multicast_groups {
  61         BATADV_NL_MCGRP_TPMETER,
  62 };
  63
  64 static struct genl_multicast_group batadv_netlink_mcgrps[] = {
  65         [BATADV_NL_MCGRP_TPMETER] = { .name = BATADV_NL_MCAST_GROUP_TPMETER },
  66 };
  67
  68 static struct nla_policy batadv_netlink_policy[NUM_BATADV_ATTR] = {
  69         [BATADV_ATTR_VERSION]           = { .type = NLA_STRING },
  70         [BATADV_ATTR_ALGO_NAME]         = { .type = NLA_STRING },
  71         [BATADV_ATTR_MESH_IFINDEX]      = { .type = NLA_U32 },
  72         [BATADV_ATTR_MESH_IFNAME]       = { .type = NLA_STRING },
  73         [BATADV_ATTR_MESH_ADDRESS]      = { .len = ETH_ALEN },
  74         [BATADV_ATTR_HARD_IFINDEX]      = { .type = NLA_U32 },
  75         [BATADV_ATTR_HARD_IFNAME]       = { .type = NLA_STRING },
  76         [BATADV_ATTR_HARD_ADDRESS]      = { .len = ETH_ALEN },
  77         [BATADV_ATTR_ORIG_ADDRESS]      = { .len = ETH_ALEN },
  78         [BATADV_ATTR_TPMETER_RESULT]    = { .type = NLA_U8 },
  79         [BATADV_ATTR_TPMETER_TEST_TIME] = { .type = NLA_U32 },
  80         [BATADV_ATTR_TPMETER_BYTES]     = { .type = NLA_U64 },
  81         [BATADV_ATTR_TPMETER_COOKIE]    = { .type = NLA_U32 },
  82         [BATADV_ATTR_ACTIVE]            = { .type = NLA_FLAG },
  83         [BATADV_ATTR_TT_ADDRESS]        = { .len = ETH_ALEN },
  84         [BATADV_ATTR_TT_TTVN]           = { .type = NLA_U8 },
  85         [BATADV_ATTR_TT_LAST_TTVN]      = { .type = NLA_U8 },
  86         [BATADV_ATTR_TT_CRC32]          = { .type = NLA_U32 },
  87         [BATADV_ATTR_TT_VID]            = { .type = NLA_U16 },
  88         [BATADV_ATTR_TT_FLAGS]          = { .type = NLA_U32 },
  89         [BATADV_ATTR_FLAG_BEST]         = { .type = NLA_FLAG },
  90         [BATADV_ATTR_LAST_SEEN_MSECS]   = { .type = NLA_U32 },
  91         [BATADV_ATTR_NEIGH_ADDRESS]     = { .len = ETH_ALEN },
  92         [BATADV_ATTR_TQ]                = { .type = NLA_U8 },
  93         [BATADV_ATTR_THROUGHPUT]        = { .type = NLA_U32 },
  94         [BATADV_ATTR_BANDWIDTH_UP]      = { .type = NLA_U32 },
  95         [BATADV_ATTR_BANDWIDTH_DOWN]    = { .type = NLA_U32 },
  96         [BATADV_ATTR_ROUTER]            = { .len = ETH_ALEN },
  97         [BATADV_ATTR_BLA_OWN]           = { .type = NLA_FLAG },
  98         [BATADV_ATTR_BLA_ADDRESS]       = { .len = ETH_ALEN },
  99         [BATADV_ATTR_BLA_VID]           = { .type = NLA_U16 },
 100         [BATADV_ATTR_BLA_BACKBONE]      = { .len = ETH_ALEN },
 101         [BATADV_ATTR_BLA_CRC]           = { .type = NLA_U16 },
 102 };
 103
 104 /**
 105  * batadv_netlink_get_ifindex - Extract an interface index from a message
 106  * @nlh: Message header
 107  * @attrtype: Attribute which holds an interface index
 108  *
 109  * Return: interface index, or 0.
 110  */
 111 int
 112 batadv_netlink_get_ifindex(const struct nlmsghdr *nlh, int attrtype)
 113 {
 114         struct nlattr *attr = nlmsg_find_attr(nlh, GENL_HDRLEN, attrtype);
 115
 116         return attr ? nla_get_u32(attr) : 0;
 117 }
 118
 119 /**
 120  * batadv_netlink_mesh_info_put - fill in generic information about mesh
 121  *  interface
 122  * @msg: netlink message to be sent back
 123  * @soft_iface: interface for which the data should be taken
 124  *
 125  * Return: 0 on success, < 0 on error
 126  */
 127 static int
 128 batadv_netlink_mesh_info_put(struct sk_buff *msg, struct net_device *soft_iface)
 129 {
 130         struct batadv_priv *bat_priv = netdev_priv(soft_iface);
 131         struct batadv_hard_iface *primary_if = NULL;
 132         struct net_device *hard_iface;
 133         int ret = -ENOBUFS;
 134
 135         if (nla_put_string(msg, BATADV_ATTR_VERSION, BATADV_SOURCE_VERSION) ||
 136             nla_put_string(msg, BATADV_ATTR_ALGO_NAME,
 137                            bat_priv->algo_ops->name) ||
 138             nla_put_u32(msg, BATADV_ATTR_MESH_IFINDEX, soft_iface->ifindex) ||
 139             nla_put_string(msg, BATADV_ATTR_MESH_IFNAME, soft_iface->name) ||
 140             nla_put(msg, BATADV_ATTR_MESH_ADDRESS, ETH_ALEN,
 141                     soft_iface->dev_addr) ||
 142             nla_put_u8(msg, BATADV_ATTR_TT_TTVN,
 143                        (u8)atomic_read(&bat_priv->tt.vn)))
 144                 goto out;
 145
 146 #ifdef CONFIG_BATMAN_ADV_BLA
 147         if (nla_put_u16(msg, BATADV_ATTR_BLA_CRC,
 148                         ntohs(bat_priv->bla.claim_dest.group)))
 149                 goto out;
 150 #endif
 151
 152         primary_if = batadv_primary_if_get_selected(bat_priv);
 153         if (primary_if && primary_if->if_status == BATADV_IF_ACTIVE) {
 154                 hard_iface = primary_if->net_dev;
 155
 156                 if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
 157                                 hard_iface->ifindex) ||
 158                     nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
 159                                    hard_iface->name) ||
 160                     nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
 161                             hard_iface->dev_addr))
 162                         goto out;
 163         }
 164
 165         ret = 0;
 166
 167  out:
 168         if (primary_if)
 169                 batadv_hardif_put(primary_if);
 170
 171         return ret;
 172 }
 173
 174 /**
 175  * batadv_netlink_get_mesh_info - handle incoming BATADV_CMD_GET_MESH_INFO
 176  *  netlink request
 177  * @skb: received netlink message
 178  * @info: receiver information
 179  *
 180  * Return: 0 on success, < 0 on error
 181  */
 182 static int
 183 batadv_netlink_get_mesh_info(struct sk_buff *skb, struct genl_info *info)
 184 {
 185         struct net *net = genl_info_net(info);
 186         struct net_device *soft_iface;
 187         struct sk_buff *msg = NULL;
 188         void *msg_head;
 189         int ifindex;
 190         int ret;
 191
 192         if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
 193                 return -EINVAL;
 194
 195         ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
 196         if (!ifindex)
 197                 return -EINVAL;
 198
 199         soft_iface = dev_get_by_index(net, ifindex);
 200         if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
 201                 ret = -ENODEV;
 202                 goto out;
 203         }
 204
 205         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 206         if (!msg) {
 207                 ret = -ENOMEM;
 208                 goto out;
 209         }
 210
 211         msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
 212                                &batadv_netlink_family, 0,
 213                                BATADV_CMD_GET_MESH_INFO);
 214         if (!msg_head) {
 215                 ret = -ENOBUFS;
 216                 goto out;
 217         }
 218
 219         ret = batadv_netlink_mesh_info_put(msg, soft_iface);
 220
 221  out:
 222         if (soft_iface)
 223                 dev_put(soft_iface);
 224
 225         if (ret) {
 226                 if (msg)
 227                         nlmsg_free(msg);
 228                 return ret;
 229         }
 230
 231         genlmsg_end(msg, msg_head);
 232         return genlmsg_reply(msg, info);
 233 }
 234
 235 /**
 236  * batadv_netlink_tp_meter_put - Fill information of started tp_meter session
 237  * @msg: netlink message to be sent back
 238  * @cookie: tp meter session cookie
 239  *
 240  *  Return: 0 on success, < 0 on error
 241  */
 242 static int
 243 batadv_netlink_tp_meter_put(struct sk_buff *msg, u32 cookie)
 244 {
 245         if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
 246                 return -ENOBUFS;
 247
 248         return 0;
 249 }
 250
 251 /**
 252  * batadv_netlink_tpmeter_notify - send tp_meter result via netlink to client
 253  * @bat_priv: the bat priv with all the soft interface information
 254  * @dst: destination of tp_meter session
 255  * @result: reason for tp meter session stop
 256  * @test_time: total time ot the tp_meter session
 257  * @total_bytes: bytes acked to the receiver
 258  * @cookie: cookie of tp_meter session
 259  *
 260  * Return: 0 on success, < 0 on error
 261  */
 262 int batadv_netlink_tpmeter_notify(struct batadv_priv *bat_priv, const u8 *dst,
 263                                   u8 result, u32 test_time, u64 total_bytes,
 264                                   u32 cookie)
 265 {
 266         struct sk_buff *msg;
 267         void *hdr;
 268         int ret;
 269
 270         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 271         if (!msg)
 272                 return -ENOMEM;
 273
 274         hdr = genlmsg_put(msg, 0, 0, &batadv_netlink_family, 0,
 275                           BATADV_CMD_TP_METER);
 276         if (!hdr) {
 277                 ret = -ENOBUFS;
 278                 goto err_genlmsg;
 279         }
 280
 281         if (nla_put_u32(msg, BATADV_ATTR_TPMETER_COOKIE, cookie))
 282                 goto nla_put_failure;
 283
 284         if (nla_put_u32(msg, BATADV_ATTR_TPMETER_TEST_TIME, test_time))
 285                 goto nla_put_failure;
 286
 287         if (nla_put_u64_64bit(msg, BATADV_ATTR_TPMETER_BYTES, total_bytes,
 288                               BATADV_ATTR_PAD))
 289                 goto nla_put_failure;
 290
 291         if (nla_put_u8(msg, BATADV_ATTR_TPMETER_RESULT, result))
 292                 goto nla_put_failure;
 293
 294         if (nla_put(msg, BATADV_ATTR_ORIG_ADDRESS, ETH_ALEN, dst))
 295                 goto nla_put_failure;
 296
 297         genlmsg_end(msg, hdr);
 298
 299         genlmsg_multicast_netns(&batadv_netlink_family,
 300                                 dev_net(bat_priv->soft_iface), msg, 0,
 301                                 BATADV_NL_MCGRP_TPMETER, GFP_KERNEL);
 302
 303         return 0;
 304
 305 nla_put_failure:
 306         genlmsg_cancel(msg, hdr);
 307         ret = -EMSGSIZE;
 308
 309 err_genlmsg:
 310         nlmsg_free(msg);
 311         return ret;
 312 }
 313
 314 /**
 315  * batadv_netlink_tp_meter_start - Start a new tp_meter session
 316  * @skb: received netlink message
 317  * @info: receiver information
 318  *
 319  * Return: 0 on success, < 0 on error
 320  */
 321 static int
 322 batadv_netlink_tp_meter_start(struct sk_buff *skb, struct genl_info *info)
 323 {
 324         struct net *net = genl_info_net(info);
 325         struct net_device *soft_iface;
 326         struct batadv_priv *bat_priv;
 327         struct sk_buff *msg = NULL;
 328         u32 test_length;
 329         void *msg_head;
 330         int ifindex;
 331         u32 cookie;
 332         u8 *dst;
 333         int ret;
 334
 335         if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
 336                 return -EINVAL;
 337
 338         if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
 339                 return -EINVAL;
 340
 341         if (!info->attrs[BATADV_ATTR_TPMETER_TEST_TIME])
 342                 return -EINVAL;
 343
 344         ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
 345         if (!ifindex)
 346                 return -EINVAL;
 347
 348         dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
 349
 350         test_length = nla_get_u32(info->attrs[BATADV_ATTR_TPMETER_TEST_TIME]);
 351
 352         soft_iface = dev_get_by_index(net, ifindex);
 353         if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
 354                 ret = -ENODEV;
 355                 goto out;
 356         }
 357
 358         msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
 359         if (!msg) {
 360                 ret = -ENOMEM;
 361                 goto out;
 362         }
 363
 364         msg_head = genlmsg_put(msg, info->snd_portid, info->snd_seq,
 365                                &batadv_netlink_family, 0,
 366                                BATADV_CMD_TP_METER);
 367         if (!msg_head) {
 368                 ret = -ENOBUFS;
 369                 goto out;
 370         }
 371
 372         bat_priv = netdev_priv(soft_iface);
 373         batadv_tp_start(bat_priv, dst, test_length, &cookie);
 374
 375         ret = batadv_netlink_tp_meter_put(msg, cookie);
 376
 377  out:
 378         if (soft_iface)
 379                 dev_put(soft_iface);
 380
 381         if (ret) {
 382                 if (msg)
 383                         nlmsg_free(msg);
 384                 return ret;
 385         }
 386
 387         genlmsg_end(msg, msg_head);
 388         return genlmsg_reply(msg, info);
 389 }
 390
 391 /**
 392  * batadv_netlink_tp_meter_start - Cancel a running tp_meter session
 393  * @skb: received netlink message
 394  * @info: receiver information
 395  *
 396  * Return: 0 on success, < 0 on error
 397  */
 398 static int
 399 batadv_netlink_tp_meter_cancel(struct sk_buff *skb, struct genl_info *info)
 400 {
 401         struct net *net = genl_info_net(info);
 402         struct net_device *soft_iface;
 403         struct batadv_priv *bat_priv;
 404         int ifindex;
 405         u8 *dst;
 406         int ret = 0;
 407
 408         if (!info->attrs[BATADV_ATTR_MESH_IFINDEX])
 409                 return -EINVAL;
 410
 411         if (!info->attrs[BATADV_ATTR_ORIG_ADDRESS])
 412                 return -EINVAL;
 413
 414         ifindex = nla_get_u32(info->attrs[BATADV_ATTR_MESH_IFINDEX]);
 415         if (!ifindex)
 416                 return -EINVAL;
 417
 418         dst = nla_data(info->attrs[BATADV_ATTR_ORIG_ADDRESS]);
 419
 420         soft_iface = dev_get_by_index(net, ifindex);
 421         if (!soft_iface || !batadv_softif_is_valid(soft_iface)) {
 422                 ret = -ENODEV;
 423                 goto out;
 424         }
 425
 426         bat_priv = netdev_priv(soft_iface);
 427         batadv_tp_stop(bat_priv, dst, BATADV_TP_REASON_CANCEL);
 428
 429 out:
 430         if (soft_iface)
 431                 dev_put(soft_iface);
 432
 433         return ret;
 434 }
 435
 436 /**
 437  * batadv_netlink_dump_hardif_entry - Dump one hard interface into a message
 438  * @msg: Netlink message to dump into
 439  * @portid: Port making netlink request
 440  * @seq: Sequence number of netlink message
 441  * @hard_iface: Hard interface to dump
 442  *
 443  * Return: error code, or 0 on success
 444  */
 445 static int
 446 batadv_netlink_dump_hardif_entry(struct sk_buff *msg, u32 portid, u32 seq,
 447                                  struct batadv_hard_iface *hard_iface)
 448 {
 449         struct net_device *net_dev = hard_iface->net_dev;
 450         void *hdr;
 451
 452         hdr = genlmsg_put(msg, portid, seq, &batadv_netlink_family, NLM_F_MULTI,
 453                           BATADV_CMD_GET_HARDIFS);
 454         if (!hdr)
 455                 return -EMSGSIZE;
 456
 457         if (nla_put_u32(msg, BATADV_ATTR_HARD_IFINDEX,
 458                         net_dev->ifindex) ||
 459             nla_put_string(msg, BATADV_ATTR_HARD_IFNAME,
 460                            net_dev->name) ||
 461             nla_put(msg, BATADV_ATTR_HARD_ADDRESS, ETH_ALEN,
 462                     net_dev->dev_addr))
 463                 goto nla_put_failure;
 464
 465         if (hard_iface->if_status == BATADV_IF_ACTIVE) {
 466                 if (nla_put_flag(msg, BATADV_ATTR_ACTIVE))
 467                         goto nla_put_failure;
 468         }
 469
 470         genlmsg_end(msg, hdr);
 471         return 0;
 472
 473  nla_put_failure:
 474         genlmsg_cancel(msg, hdr);
 475         return -EMSGSIZE;
 476 }
 477
 478 /**
 479  * batadv_netlink_dump_hardifs - Dump all hard interface into a messages
 480  * @msg: Netlink message to dump into
 481  * @cb: Parameters from query
 482  *
 483  * Return: error code, or length of reply message on success
 484  */
 485 static int
 486 batadv_netlink_dump_hardifs(struct sk_buff *msg, struct netlink_callback *cb)
 487 {
 488         struct net *net = sock_net(cb->skb->sk);
 489         struct net_device *soft_iface;
 490         struct batadv_hard_iface *hard_iface;
 491         int ifindex;
 492         int portid = NETLINK_CB(cb->skb).portid;
 493         int seq = cb->nlh->nlmsg_seq;
 494         int skip = cb->args[0];
 495         int i = 0;
 496
 497         ifindex = batadv_netlink_get_ifindex(cb->nlh,
 498                                              BATADV_ATTR_MESH_IFINDEX);
 499         if (!ifindex)
 500                 return -EINVAL;
 501
 502         soft_iface = dev_get_by_index(net, ifindex);
 503         if (!soft_iface)
 504                 return -ENODEV;
 505
 506         if (!batadv_softif_is_valid(soft_iface)) {
 507                 dev_put(soft_iface);
 508                 return -ENODEV;
 509         }
 510
 511         rcu_read_lock();
 512
 513         list_for_each_entry_rcu(hard_iface, &batadv_hardif_list, list) {
 514                 if (hard_iface->soft_iface != soft_iface)
 515                         continue;
 516
 517                 if (i++ < skip)
 518                         continue;
 519
 520                 if (batadv_netlink_dump_hardif_entry(msg, portid, seq,
 521                                                      hard_iface)) {
 522                         i--;
 523                         break;
 524                 }
 525         }
 526
 527         rcu_read_unlock();
 528
 529         dev_put(soft_iface);
 530
 531         cb->args[0] = i;
 532
 533         return msg->len;
 534 }
 535
 536 static struct genl_ops batadv_netlink_ops[] = {
 537         {
 538                 .cmd = BATADV_CMD_GET_MESH_INFO,
 539                 .flags = GENL_ADMIN_PERM,
 540                 .policy = batadv_netlink_policy,
 541                 .doit = batadv_netlink_get_mesh_info,
 542         },
 543         {
 544                 .cmd = BATADV_CMD_TP_METER,
 545                 .flags = GENL_ADMIN_PERM,
 546                 .policy = batadv_netlink_policy,
 547                 .doit = batadv_netlink_tp_meter_start,
 548         },
 549         {
 550                 .cmd = BATADV_CMD_TP_METER_CANCEL,
 551                 .flags = GENL_ADMIN_PERM,
 552                 .policy = batadv_netlink_policy,
 553                 .doit = batadv_netlink_tp_meter_cancel,
 554         },
 555         {
 556                 .cmd = BATADV_CMD_GET_ROUTING_ALGOS,
 557                 .flags = GENL_ADMIN_PERM,
 558                 .policy = batadv_netlink_policy,
 559                 .dumpit = batadv_algo_dump,
 560         },
 561         {
 562                 .cmd = BATADV_CMD_GET_HARDIFS,
 563                 .flags = GENL_ADMIN_PERM,
 564                 .policy = batadv_netlink_policy,
 565                 .dumpit = batadv_netlink_dump_hardifs,
 566         },
 567         {
 568                 .cmd = BATADV_CMD_GET_TRANSTABLE_LOCAL,
 569                 .flags = GENL_ADMIN_PERM,
 570                 .policy = batadv_netlink_policy,
 571                 .dumpit = batadv_tt_local_dump,
 572         },
 573         {
 574                 .cmd = BATADV_CMD_GET_TRANSTABLE_GLOBAL,
 575                 .flags = GENL_ADMIN_PERM,
 576                 .policy = batadv_netlink_policy,
 577                 .dumpit = batadv_tt_global_dump,
 578         },
 579         {
 580                 .cmd = BATADV_CMD_GET_ORIGINATORS,
 581                 .flags = GENL_ADMIN_PERM,
 582                 .policy = batadv_netlink_policy,
 583                 .dumpit = batadv_orig_dump,
 584         },
 585         {
 586                 .cmd = BATADV_CMD_GET_NEIGHBORS,
 587                 .flags = GENL_ADMIN_PERM,
 588                 .policy = batadv_netlink_policy,
 589                 .dumpit = batadv_hardif_neigh_dump,
 590         },
 591         {
 592                 .cmd = BATADV_CMD_GET_GATEWAYS,
 593                 .flags = GENL_ADMIN_PERM,
 594                 .policy = batadv_netlink_policy,
 595                 .dumpit = batadv_gw_dump,
 596         },
 597         {
 598                 .cmd = BATADV_CMD_GET_BLA_CLAIM,
 599                 .flags = GENL_ADMIN_PERM,
 600                 .policy = batadv_netlink_policy,
 601                 .dumpit = batadv_bla_claim_dump,
 602         },
 603 };
 604
 605 /**
 606  * batadv_netlink_register - register batadv genl netlink family
 607  */
 608 void __init batadv_netlink_register(void)
 609 {
 610         int ret;
 611
 612         ret = genl_register_family_with_ops_groups(&batadv_netlink_family,
 613                                                    batadv_netlink_ops,
 614                                                    batadv_netlink_mcgrps);
 615         if (ret)
 616                 pr_warn("unable to register netlink family");
 617 }
 618
 619 /**
 620  * batadv_netlink_unregister - unregister batadv genl netlink family
 621  */
 622 void batadv_netlink_unregister(void)
 623 {
 624         genl_unregister_family(&batadv_netlink_family);
 625 }